From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266453AbUGUOkN (ORCPT ); Wed, 21 Jul 2004 10:40:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266349AbUGUOkN (ORCPT ); Wed, 21 Jul 2004 10:40:13 -0400 Received: from [194.243.27.136] ([194.243.27.136]:1546 "HELO venere.pandoraonline.it") by vger.kernel.org with SMTP id S266453AbUGUOkG (ORCPT ); Wed, 21 Jul 2004 10:40:06 -0400 X-Qmail-Scanner-Mail-From: devel@integra-sc.it via venere.pandoraonline.it X-Qmail-Scanner-Rcpt-To: ahu@ds9a.nl,shesha@inostor.com,linux-kernel@vger.kernel.org,kernelnewbies@nl.linux.org X-Qmail-Scanner: 1.22 (Clear:RC:1(213.140.22.76):. Processed in 0.16415 secs) Date: Wed, 21 Jul 2004 16:45:10 +0200 From: Devel To: bert hubert Cc: shesha@inostor.com, linux-kernel@vger.kernel.org, kernelnewbies@nl.linux.org Subject: Re: O_DIRECT Message-Id: <20040721164510.3086b49f.devel@integra-sc.it> In-Reply-To: <20040720184824.GA30090@outpost.ds9a.nl> References: <40FD561D.1010404@inostor.com> <20040720184824.GA30090@outpost.ds9a.nl> Organization: Integra Solutions X-Mailer: Sylpheed version 0.9.10 (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi all, how i can write data on a partition without a filesystem?? Saluti Carlo! Il Tue, 20 Jul 2004 20:48:24 +0200 bert hubert scrisse: > On Tue, Jul 20, 2004 at 10:27:57AM -0700, Shesha Sreenivasamurthy wrote: > > I am having trouble with O_DIRECT. Trying to read or write from a block > > device partition. > > > > 1. Can O_DIRECT be used on a plain block device partition say > > "/dev/sda11" without having a filesystem on it. > > As fas as I know, yes, but be aware that O_DIRECT requires page aligned > addresses! (an integral of 4096 on most systems). > > > 2. If no file system is created then what should be the softblock size. > > I am using the IOCTL "BLKBSZGET". Is this correct? > > No idea what you mean - but see above about the aligned addresses. > > > 3. Can we use SEEK_END with O_DIRECT on a partition without filesystem. > > I see no reason why not. Good luck! > > -- > http://www.PowerDNS.com Open source, database driven DNS Software > http://lartc.org Linux Advanced Routing & Traffic Control HOWTO > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >